Method for well completion

Abstract

The disclosure pertains to methods for completing a well comprising locating a production tubing having a plurality of sleeve valves, each having a sliding sleeve therein within a well bore and locating a tool operable to open said plurality of sleeve valves within said production tubing. The method further comprises repeating for at least one of said plurality of sleeve valves the steps of opening a one of said plurality of sleeve valves with said tool, performing a fracturing operation and closing said one of said plurality of sleeve valves.

What is claimed is: 
     
         1 . A method for performing a fracturing operation on a rock formation surrounding a wellbore, the method comprising:
 locating a production tubing having a plurality of sleeve valves, each having a sliding sleeve therein within a well bore;   locating a tool operable to open said plurality of sleeve valves within said production tubing; and   repeating for at least one of said plurality of sleeve valves the steps of:
 opening a one of said plurality of sleeve valves with said tool, 
 performing a fracturing operation; and 
 closing said one of said plurality of sleeve valves. 
   
     
     
         2 . The method of  claim 1  wherein said tool is located within said sleeve valve before opening said sleeve valve. 
     
     
         3 . The method of  claim 1  wherein said opening of one of a plurality of sleeve valves comprises extending at least one key from said tool into engagement with said sliding sleeve and slidably shifting said sliding sleeve longitudinally within said well to open said one of said plurality of sleeve valves. 
     
     
         4 . The method of  claim 1  wherein said closing of one of a plurality of sleeve valves comprises slidably shifting said sliding sleeve longitudinally within said well to close said one of said plurality of sleeve valves and retracting at least one key from said tool into engagement with said sliding sleeve. 
     
     
         5 . The method of  claim 1  wherein said plurality of sleeve valves are opened, have a fracturing operation performed therethrough and closed starting at the top most sleeve valve and ending with a bottom most sleeve valve. 
     
     
         6 . The method of  claim 5  further comprising opening all of said plurality of sleeve valves as said tool is retracted from said well for subsequent production of said well. 
     
     
         7 . The method of  claim 1  wherein said tool remains within said production casing during said fracturing operation. 
     
     
         8 . The method of  claim 7  wherein said tool remains within said sleeve valve during said fracturing operation. 
     
     
         9 . The method of  claim 1  further comprising cementing said production casing within said well. 
     
     
         10 . The method of  claim 9  wherein an annular cavity between said production casing and said well is clear of packers.